Product Description:

The P21NRXC-LNF-NS-00 is a hybrid stepper motor produced by Pacific Scientific within the POWERMAX II P Motors series. Designed for open-loop positioning in pick-and-place units, indexing tables, and light linear stages, it converts digital command pulses into discrete shaft movement so that machinery can advance in repeatable increments without an external feedback device. Its compact geometry supports installations where axial space is limited, allowing multiple axes to be placed in close proximity. This layout makes the motor suitable for compact automation assemblies where several motion points must fit within a small machine envelope.

Its static holding torque of 0.82 Nm lets the shaft resist load when energized, while the fine 1.8 degrees step angle yields 200 full steps per revolution with a step accuracy of ±1.5%. The two-phase winding, identified as type C, draws a phase current of 3.5 A through 1.06 Ω of resistance and stores energy in 2.3 mH of inductance, supporting microstepping drives that modulate current smoothly. Electrical insulation follows Class B, 130 °C limits; insulation resistance is 100 MΩ and the coil is tested to 340 VDC, so dielectric margins suit common drive voltages. Connection is made through regular lead wires that terminate in a receptacle, and the motor mounts to NEMA equipment through its standard frame. The 57.10 mm body width matches the NEMA 23 envelope, which helps the motor fit common brackets, couplings, and mounting faces used on compact motion axes.

With a mass of 0.68 kg, the single-stack rotor presents only 0.000012 kg·m² of inertia, which helps reduce overshoot during rapid starts and stops. At rest, a mechanical detent torque of 0.03 Nm holds the shaft lightly when the phases are de-energized, so the rotor keeps a small natural holding effect even without drive current. The body measures 52.4 mm long, accepts a 6.35 mm single-flat shaft, and reaches a maximum surface temperature of 95 °C during operation. Standard rotor design, NEMA mounting holes, and an ambient operating range of -20 °C to +40 °C allow use inside typical control cabinets where ventilation may be limited. These characteristics support short indexing moves, light conveying tasks, and other applications that need repeatable incremental rotation from a compact motor.